Feature:1. Important Parameters: This lens works with C mount, with fixed zoom and manual focus, iris, approximate 75mm/2.95in focal length, and 10Mega Pixel.2. Tough Shell: The lens is protected by high quality aluminum alloy shell, which can be used in extreme environments, and better protect the lens.3. Clear: Covered with optical coating, which will ensure sharp image with low distortion, providing you better shooting experience.4. High Quality: The lens can be operated with manual focus and adjustable aperture, with no lens shadows, no vignetting, and high image quality.5. Easy Installation: You just need to screw and fix the aperture lens into the back focus adjustment ring on your HD camera.Specification:Item Type: Manual Focus LensMaterial: Aluminium Alloy.Resolution: 10Mega PixelImage Format: Approx. 1in/2.54cm (16, 12.8x9.6)Focal Length: Approx. 75mm/2.95inD/f: F2.8-16Mount: C mountField Angle (H x V): 1in, 9.72 x 7.23Field Angle (H x V): 3in, 6.70 x 5.02Field Angle (H x V): 1/1.8in, 5.50 x 4.01Field Angle (H x V): 1/2in, 4.90 x 3.70Distortion: -0.05%MOD: Approx. 1.2m/47.24inDimension: Approx. 39 x 46mm/1.54 x 1.81inFilter Size: UV M35.5x0.5PZoom: FixedIris: ManualFocus: ManualOperating Temperature: -20 to +80Package List:1 x Lens1 x AdapterNote:Optical coating is essential for lens imaging, it is necessary to gently handle the coating to avoid scratching when using